Control of 1D wave versus 2D honeycomb CoIIICdIICuI heterotrimetallic architectures by Delta L-Lambda L diastereoisomerism of L-cysteinatocobalt(III) building units.

The reactions of the Delta L and Lambda L isomers of [Co( l-Hcys- N, S)(en) 2] (2+) ( l-H 2cys = l-cysteine) with CuCl in aqueous HCl gave Co (III)Cu (I) dinuclear complexes with the same S-bridged structures, Delta L- 1 and Lambda L- 1. When Delta L- 1 was treated with CdCl 2 in water, a 1D wavelike (Co (III) 2Cd (II)Cu (I)) n polymeric complex ( 2) was produced. On the other hand, similar treatment of Lambda L- 1 led to the formation of a 2D honeycomb-like (Co (III) 3Cd (II) 3Cu (I)) n polymeric complex ( 3), supported by the presence of counter-monoanions.